In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. This requires adding a pointer back
to the sta_info since container_of() can't resolve the sta_info.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

These functions drifts TSF timers, not TBTT.
Signed-off-by: NMasashi Honma <masashi.honma@gmail.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mesh path table needs to be around for the entire time the
interface is in mesh mode, as users can perform an mpath dump
at any time.  The existing path table lifetime is instead tied
to the mesh BSS which can cause crashes when different MBSSes
are joined in the context of a single interface, or when the
path table is dumped when no MBSS is joined.

Introduce a new function to perform the final teardown of the
interface and perform path table cleanup there.  We already
free the individual path elements when the leaving the mesh
so no additional cleanup is needed there.  This fixes the
following crash:

[   47.753026] BUG: unable to handle kernel paging request at fffffff0
[   47.753026] IP: [<c0239765>] kthread_data+0xa/0xe
[   47.753026] *pde = 00741067 *pte = 00000000
[   47.753026] Oops: 0000 [#4] PREEMPT
[   47.753026] Modules linked in: ppp_generic slhc 8021q garp mrp sch_fq_codel iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat ip_tables ath9k_htc ath5k 8139too ath10k_pci ath10k_core arc4 ath9k ath9k_common ath9k_hw mac80211 ath cfg80211 cpufreq_powersave br_netfilter bridge stp llc ipw usb_wwan sierra_net usbnet af_alg natsemi via_rhine mii iTCO_wdt iTCO_vendor_support gpio_ich sierra coretemp pcspkr i2c_i801 lpc_ich ata_generic ata_piix libata ide_pci_generic piix e1000e igb i2c_algo_bit ptp pps_core [last unloaded: 8139too]
[   47.753026] CPU: 0 PID: 12 Comm: kworker/u2:1 Tainted: G      D W       4.5.0-wt-V3 #6
[   47.753026] Hardware name: To Be Filled By O.E.M./To be filled by O.E.M., BIOS 080016  11/07/2014
[   47.753026] task: f645a0c0 ti: f6462000 task.ti: f6462000
[   47.753026] EIP: 0060:[<c0239765>] EFLAGS: 00010002 CPU: 0
[   47.753026] EIP is at kthread_data+0xa/0xe
[   47.753026] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[   47.753026] ESI: f645a0c0 EDI: f645a2fc EBP: f6463a80 ESP: f6463a78
[   47.753026]  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[   47.753026] CR0: 8005003b CR2: 00000014 CR3: 353e5000 CR4: 00000690
[   47.753026] Stack:
[   47.753026]  c0236866 00000000 f6463aac c05768b4 00000009 f6463ba8 f6463ab0 c0247010
[   47.753026]  00000000 f645a0c0 f6464000 00000009 f6463ba8 f6463ab8 c0576eb2 f645a0c0
[   47.753026]  f6463aec c0228be4 c06335a4 f6463adc f6463ad0 c06c06d4 f6463ae4 c02471b0
[   47.753026] Call Trace:
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0247010>] ? vprintk_default+0x12/0x14
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c0228be4>] do_exit+0xb8/0x71d
[   47.753026]  [<c02471b0>] ? kmsg_dump+0xa9/0xae
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c0239765>] ? kthread_data+0xa/0xe
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0247010>] ? vprintk_default+0x12/0x14
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c0228be4>] do_exit+0xb8/0x71d
[   47.753026]  [<c02471b0>] ? kmsg_dump+0xa9/0xae
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c0239765>] ? kthread_data+0xa/0xe
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0391e32>] ? put_io_context_active+0x6d/0x95
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c02291f8>] do_exit+0x6cc/0x71d
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c03b9160>] ? debug_smp_processor_id+0x12/0x16
[   47.753026]  [<c02015e2>] ? __switch_to+0x24/0x40e
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c03b59d2>] ? rhashtable_walk_init+0x5c/0x93
[   47.753026]  [<f9843221>] mesh_path_tbl_expire.isra.24+0x19/0x82 [mac80211]
[   47.753026]  [<f984408b>] mesh_path_expire+0x11/0x1f [mac80211]
[   47.753026]  [<f9842bb7>] ieee80211_mesh_work+0x73/0x1a9 [mac80211]
[   47.753026]  [<f98207d1>] ieee80211_iface_work+0x2ff/0x311 [mac80211]
[   47.753026]  [<c0235fa3>] process_one_work+0x14b/0x24e
[   47.753026]  [<c0236313>] worker_thread+0x249/0x343
[   47.753026]  [<c02360ca>] ? process_scheduled_works+0x24/0x24
[   47.753026]  [<c0239359>] kthread+0x9e/0xa3
[   47.753026]  [<c0578e50>] ret_from_kernel_thread+0x20/0x40
[   47.753026]  [<c02392bb>] ? kthread_parkme+0x18/0x18
[   47.753026] Code: 6b c0 85 c0 75 05 e8 fb 74 fc ff 89 f8 84 c0 75 08 8d 45 e8 e8 34 dd 33 00 83 c4 28 5b 5e 5f 5d c3 55 8b 80 10 02 00 00 89 e5 5d <8b> 40 f0 c3 55 b9 04 00 00 00 89 e5 52 8b 90 10 02 00 00 8d 45
[   47.753026] EIP: [<c0239765>] kthread_data+0xa/0xe SS:ESP 0068:f6463a78
[   47.753026] CR2: 00000000fffffff0
[   47.753026] ---[ end trace 867ca0bdd0767790 ]---

Fixes: 3b302ada7f0a ("mac80211: mesh: move path tables into if_mesh")
Reported-by: NFred Veldini <fred.veldini@gmail.com>
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Several of the mesh path fields are undocumented and some
of the documentation is no longer correct or relevant after
the switch to rhashtable.  Clean up the kernel doc
accordingly and reorder some fields to match the structure
layout.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Reduce padding waste in struct mesh_table and struct rmc_entry by
moving the smaller fields to the end.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Since we have converted the mesh path tables to rhashtable, we are
no longer swapping out the entire mesh_pathtbl pointer with RCU.
As a result, we no longer need indirection to the hlist head for
the gates list and can simply embed it, saving a pair of
pointer-sized allocations.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The RMC cache has 256 list heads plus a u32, which puts it at the
unfortunate size of 4104 bytes with padding.  kmalloc() will then
round this up to the next power-of-two, so we wind up actually
using two pages here where most of the second is wasted.

Switch to hlist heads here to reduce the structure size down to
fit within a page.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mesh_path_reclaim() function, called from an rcu callback, cancels
the mesh_path_timer associated with a mesh path.  Unfortunately, this
call can happen much later, perhaps after the hash table itself is
destroyed.

Such a situation led to the following crash in mesh_path_send_to_gates()
when dereferencing the tbl pointer:

[   23.901661] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[   23.905516] IP: [<ffffffff814c910b>] mesh_path_send_to_gates+0x2b/0x740
[   23.908757] PGD 99ca067 PUD 99c4067 PMD 0
[   23.910789] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[   23.913485] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc6-wt+ #43
[   23.916675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[   23.920471] task: ffffffff81685500 ti: ffffffff81678000 task.ti: ffffffff81678000
[   23.922619] RIP: 0010:[<ffffffff814c910b>]  [<ffffffff814c910b>] mesh_path_send_to_gates+0x2b/0x740
[   23.925237] RSP: 0018:ffff88000b403d30  EFLAGS: 00010286
[   23.926739] RAX: 0000000000000000 RBX: ffff880009bc0d20 RCX: 0000000000000102
[   23.928796] RDX: 000000000000002e RSI: 0000000000000001 RDI: ffff880009bc0d20
[   23.930895] RBP: ffff88000b403e18 R08: 0000000000000001 R09: 0000000000000001
[   23.932917] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880009c20940
[   23.936370] R13: ffff880009bc0e70 R14: ffff880009c21c40 R15: ffff880009bc0d20
[   23.939823] FS:  0000000000000000(0000) GS:ffff88000b400000(0000) knlGS:0000000000000000
[   23.943688] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   23.946429] CR2: 0000000000000008 CR3: 00000000099c5000 CR4: 00000000000006b0
[   23.949861] Stack:
[   23.950840]  000000000000002e ffff880009c20940 ffff88000b403da8 ffffffff8109e551
[   23.954467]  ffffffff82711be2 000000000000002e 0000000000000000 ffffffff8166a5f5
[   23.958141]  0000000000685ce8 0000000000000246 ffff880009bc0d20 ffff880009c20940
[   23.961801] Call Trace:
[   23.962987]  <IRQ>
[   23.963963]  [<ffffffff8109e551>] ? vprintk_emit+0x351/0x5e0
[   23.966782]  [<ffffffff8109e8ff>] ? vprintk_default+0x1f/0x30
[   23.969529]  [<ffffffff810ffa41>] ? printk+0x48/0x50
[   23.971956]  [<ffffffff814ceef3>] mesh_path_timer+0x133/0x160
[   23.974707]  [<ffffffff814cedc0>] ? mesh_nexthop_resolve+0x230/0x230
[   23.977775]  [<ffffffff810b04ee>] call_timer_fn+0xce/0x330
[   23.980448]  [<ffffffff810b0425>] ? call_timer_fn+0x5/0x330
[   23.983126]  [<ffffffff814cedc0>] ? mesh_nexthop_resolve+0x230/0x230
[   23.986091]  [<ffffffff810b097c>] run_timer_softirq+0x22c/0x390

Instead of cancelling in the RCU callback, set a new flag to prevent the
timer from being rearmed, and then cancel the timer synchronously when
freeing the mesh path.  This leaves mesh_path_reclaim() doing nothing
but kfree, so switch to kfree_rcu().

Fixes: 3b302ada7f0a ("mac80211: mesh: move path tables into if_mesh")
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In the time since the mesh path table was implemented as an
RCU-traversable, dynamically growing hash table, a generic RCU
hashtable implementation was added to the kernel.

Switch the mesh path table over to rhashtable to remove some code
and also gain some features like automatic shrinking.

Cc: Thomas Graf <tgraf@suug.ch>
Cc: netdev@vger.kernel.org
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mesh path table uses a struct mesh_node in its hlists in
order to support a resizable hash table: the mesh_node provides
an indirection to the actual mesh path so that two different
bucket lists can point to the same path entry.

However, for the known gates list, we don't need this indirection
because there is ever only one list.  So we can just embed the
hlist_node in the mesh path itself, which simplifies things a bit
and saves a linear search whenever we need to find an item in
the list.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mesh path and mesh gate hashtables are global, containing
all of the mpaths for every mesh interface, but the paths are
all tied logically to a single interface.  The common case is
just a single mesh interface, so optimize for that by moving
the global hashtable into the per-interface struct.

Doing so allows us to drop sdata pointer comparisons inside
the lookups and also saves a few bytes of BSS and data.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mean_chain_len field in struct mesh_table is copied whenever a
new mesh table is allocated, but only ever has the value 2 and is
never otherwise updated, so just remove it and use the related
define instead.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

During a sw scan ieee80211_iface_work ignores work items for all vifs.
However after the scan complete work is requeued only for STA, ADHOC
and MESH iftypes.

This occasionally results in event processing getting delayed/not
processed for iftype AP when it coexists with a STA. This can result
in data halt and eventually disconnection on the AP interface.

Cc: stable@vger.kernel.org
Signed-off-by: NSachin Kulkarni <Sachin.Kulkarni@imgtec.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The function returns always non-negative values.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Implement the basics required for supporting very high throughput
with mesh: include VHT information elements in beacons, probe
responses, and peering action frames, and check for compatible VHT
configurations when peering.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Implement get_mpp and dump_mpp cfg80211_ops to export the content of the
802.11s mesh proxy path table to userspace.
Signed-off-by: NHenning Rogge <henning.rogge@fkie.fraunhofer.de>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Use put_unaligned_le16 and put_unaligned_le32 for
mesh_path_error_tx and mesh_path_sel_frame_tx.
Signed-off-by: NChun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Said function was removed some time ago.
Signed-off-by: NBob Copeland <bob@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instead of updating the mesh beacon immediately when
requested (which would require the sdata_lock()), defer it
to the mac80211 workqueue.

Fixes yet another deadlock on calling sta_info_flush()
with the sdata_lock() held from ieee80211_stop_mesh(). We
could just drop the sdata_lock() around the
mesh_sta_cleanup() call, but this path is also taken from
several non-locked error paths.
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
[fix comment position]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The time it takes to see the peer link expire may differ
by a minute since sta_expire() is run once a minute as a
mesh housekeeping task.
Signed-off-by: NColleen Twitty <colleen@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Cap max peerings at 63 in accordance with IEEE-2012 8.4.2.100.7.
Triggers a beacon regeneration every time the number of peerings changes.
Previously this would only happen if the "accepting peerings" bit changed.
Signed-off-by: NJacob Minshall <jacob@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Most times that mesh_path_add() is called, it is followed by
a lookup to get the just-added mpath.  We can instead just
return the new mpath in the case that we allocated one (or the
existing one if already there), so do that.  Also, reorder the
code in mesh_path_add a bit so that we don't need to allocate
in the pre-existing case.
Signed-off-by: NBob Copeland <bob@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Remove not used any longer suspend/resume code.
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's various code with strange indentation,
questionable loop and locking constructs, etc.

The bigger change is moving the "sdata" argument
to the first argument of all functions, like all
other mac80211 functions that have one.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Previously, the entire mesh beacon would be generated each
time the beacon timer fired. Instead generate a beacon
head and tail (so the TIM can easily be inserted when mesh
power save is on) when starting a mesh or the MBSS
parameters change.

Also add a mutex for protecting beacon updates and
preventing leaks.
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Make all the parsed IE pointers const, and propagate
the change to all the users etc.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

A few mesh utility functions will call
ieee80211_bss_info_change_notify(), and then the caller
might notify the driver of the same change again. Avoid
this redundancy by propagating the BSS changes and
generally calling bss_info_change_notify() once per
change.
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The patch "mac80211: clean up mesh sta allocation warning"
moved some mesh initialization into a path which is only
called when the kernel handles peering. This causes a hang
when mac80211 tries to clean up a userspace-allocated
station entry and delete a timer which has never been
initialized.

To avoid this, only do any mesh sta peering teardown if
the kernel is actually handling it.

The same is true when quiescing before suspend.
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add routines to
- maintain a PS mode for each peer and a non-peer PS mode
- indicate own PS mode in transmitted frames
- track neighbor STAs power modes
- buffer frames when neighbors are in PS mode
- add TIM and Awake Window IE to beacons
- release frames in Mesh Peer Service Periods

Add local_pm to sta_info to represent the link-specific power
mode at this station towards the remote station. When a peer
link is established, use the default power mode stored in mesh
config. Update the PS status if the peering status of a neighbor
changes.
Maintain a mesh power mode for non-peer mesh STAs. Set the
non-peer power mode to active mode during peering. Authenticated
mesh peering is currently not working when either node is
configured to be in power save mode.

Indicate the current power mode in transmitted frames. Use QoS
Nulls to indicate mesh power mode transitions.
For performance reasons, calls to the function setting the frame
flags are placed in HWMP routing routines, as there the STA
pointer is already available.

Add peer_pm to sta_info to represent the peer's link-specific
power mode towards the local station. Add nonpeer_pm to
represent the peer's power mode towards all non-peer stations.
Track power modes based on received frames.

Add the ps_data structure to ieee80211_if_mesh (for TIM map, PS
neighbor counter and group-addressed frame buffer).

Set WLAN_STA_PS flag for STA in PS mode to use the unicast frame
buffering routines in the tx path. Update num_sta_ps to buffer
and release group-addressed frames after DTIM beacons.

Announce the awake window duration in beacons if in light or
deep sleep mode towards any peer or non-peer. Create a TIM IE
similarly to AP mode and add it to mesh beacons. Parse received
Awake Window IEs and check TIM IEs for buffered frames.

Release frames towards peers in mesh Peer Service Periods. Use
the corresponding trigger frames and monitor the MPSP status.
Append a QoS Null as trigger frame if neccessary to properly end
the MPSP. Currently, in HT channels MPSPs behave imperfectly and
show large delay spikes and frame losses.
Signed-off-by: NMarco Porsch <marco@cozybit.com>
Signed-off-by: NIvan Bezyazychnyy <ivan.bezyazychnyy@gmail.com>
Signed-off-by: NMike Krinkin <krinkin.m.u@gmail.com>
Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Move the default mesh beacon interval and DTIM period to cfg80211
and make them accessible to nl80211. This enables setting both
values when joining an MBSS.

Previously the DTIM parameter was not set by mac80211 so the
driver's default value was used.
Signed-off-by: NMarco Porsch <marco@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The established peer link count is indicated in mesh beacons and
used for other internal tasks. Previously it was not updated when
authenticated peering is performed in userspace.
Signed-off-by: NMarco Porsch <marco@cozybit.com>
Acked-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The array of rmc_entrys is redundant since only the
list_head is used. Make this an array of list_heads
instead and save ~6k per vif at runtime :D
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NMarco Porsch <marco.porsch@etit.tu-chemnitz.de>
[prefix with IEEE80211_]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's no vendor-specific mesh sync implemented
and there don't need to be dummy handlers that
only print messages, so remove that code. While
at it, also constify the mesh sync ops.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

estab_plinks is not a statistics member. Hence move estab_plinks from
struct mesh_stat to struct ieee80211_if_mesh
Signed-off-by: NAshok Nagarajan <ashok@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Use skb_queue_walk_safe instead, and fix a few issues:

	- didn't free old skbs on moving
	- didn't react to failed skb alloc
	- needlessly held a local pointer to the destination frame queue
	- didn't check destination queue length before adding skb
Signed-off-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

ieee80211_bss_info_change_notify is called everytime a peer link is established
or closed, because the accepting_plinks flag in the meshconf IE *might* have changed.

With this patch the corresponding functions return the BSS_CHANGED_BEACON flag when a beacon update is necessary.

Also it makes mesh_accept_plinks_update the common place to update the accepting_plinks flag.
mesh_accept_plinks_update is called upon plink change and also periodically from ieee80211_mesh_housekeeping.
Thus, it also picks up changes of local->num_sta.
Signed-off-by: NMarco Porsch <marco.porsch@etit.tu-chemnitz.de>
Acked-by: NThomas Pedersen <thomas@cozybit.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

As defined in section 13.10.9.3 Case D (802.11-2012), this
control variable is used to limit the mesh STA to send only
one PREQ to a root mesh STA within this interval of time
(in TUs). The default value for this variable is set to
2000 TUs. However, for current implementation, the maximum
configurable of dot11MeshHWMPconfirmationInterval is
restricted by dot11MeshHWMPactivePathTimeout.
Signed-off-by: NChun-Yeow Yeoh <yeohchunyeow@gmail.com>
[line-break commit log]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NJavier Cardona <javier@cozybit.com>
Reviewed-by: NJason Abele <jason@cozybit.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>